[poppler] pdftoppm hang

Thomas Freitag Thomas.Freitag at kabelmail.de
Fri Apr 20 05:14:38 PDT 2012

Am 20.04.2012 13:47, schrieb Thomas Freitag:
> Am 16.04.2012 22:53, schrieb Ralph:
>> Hey Thomas,
>> Here's the PDF in question.  Quite a nasty one imho ;)
>> Thanks for getting back to me, sorry for the delay.
> Hey Ralph!
> In the meantime I found some time to have a look into it: The PDF has 
> 12153 image masks in pattern colorspace. My first try to render it 
> under Windows with pdftoppm compiled in debug mode dies after 22 
> minutes with out of memory.
> Then I encountered, that my implementation of colorizing image masks 
> in pattern colorspace in splash could be optimized. I gave it a try, 
> and now I'm able to render it in 250 seconds (still Windows debug 
> mode). It's still not so fast, but at least it works.
Additional information:

Under Unix 64 bit release mode it takes now 74 seconds. But You can use 
pdftocairo (only 18 seconds) if You accept, that cairo isn't able to 
render image masks in pattern colorspace correctly :-)

> My problem now is, that my code base is in the meantime completely 
> different than git master, because Albert wasn't able to commit my 
> DeviceN implementation and suspend it until 0.22. Therefore I opened a 
> bug: https://bugs.freedesktop.org/show_bug.cgi?id=48964. I need to 
> discuss it with Albert in which order my enhancements could be committed.
> At least I'll regtest my changes coming weekend, and perhaps I create 
> a patch for it only...
> BTW, it would probably help if You can send the PDF also to Albert...
> Cheers,
> Thomas
> On Wednesday, April 11, 2012 at 6:49 AM, Thomas Freitag wrote:
>> Am 11.04.2012 15:35, schrieb Ralph:
>>> Hi Folks,
>>> I have a PDF file that's causing pdftoppm to hang. Looking at an strace shows that it's doing*something*  but it's taking much longer than expected (at least over a few minutes). This is present on 0.18.3 and 0.19.2.
>>> I would attach the file to a bug post, but I'd rather email it out directly as it's a customers PDF and not mine. Who should I send this bugger to?
>> If You don't care, send it to me in private. Then I'll have a look at it
>> probably next weekend.
>> Thomas
>>> Thanks for all the help,
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